How to show iterations per second (like tdqm)

[brando90]

Original discussion: #250

e.g. tqdm has it:

 21%|██████████████████████████████████████████████████████████████████▉            21/100 [01:45<04:27,  3.39s/it]

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Other message:

I've actually had a similar question before and added a widget for it: #98

But...

I think you are looking for the AdaptiveTransferSpeed: https://progressbar-2.readthedocs.io/en/latest/progressbar.widgets.html#progressbar.widgets.AdaptiveTransferSpeed
Or the FileTransferSpeed: https://progressbar-2.readthedocs.io/en/latest/progressbar.widgets.html#progressbar.widgets.FileTransferSpeed

Instead of using B as the unit parameter, you want it in this case.
Note that by default it uses the si prefixes.
Oddly enough I remembering implementing this in a separate widget but I can't find it anymore... #98

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https://stackoverflow.com/questions/30834730/how-to-print-iterations-per-second
tqdm/tqdm#1211

[wolph]

import time
import progressbar


widgets = [
    progressbar.Percentage(),
    progressbar.Bar(),
    ' ', progressbar.SimpleProgress(),
    ' ', progressbar.ETA(),
    ' ', progressbar.AdaptiveTransferSpeed(unit='it'),
]

bar = progressbar.ProgressBar(widgets=widgets)
for i in bar(range(100)):
    time.sleep(0.2)
    bar.update(i)

This does roughly what you want I think :)

 19%|##########                                           | 19 of 100 ETA:   0:00:17   4.9 it/s

[wolph]

btw, WoLpH, I am confused about something. In the past whenever I have made a progressbar without a context manager it always seems that the progressbar thinks it's not done when my loop is actually done (but it seems I do call update enough times from the behaviour I'd expect)

You are setting max_value to 10, but range(10) only goes up to 9 :)

Additionally, in some cases it can also be caused by a performance optimization. If you are calling update for every byte while downloading a 1 gigabyte file, that would mean 1 billion calls to the progressbar. The progressbar automatically tries to update only when needed which is usually a good thing.

In some cases however... the progressbar does not know when you are finished, to fix that you can either use the contextmanager to tell it, or you can manually call bar.finish() when you are done.

[brando90]

btw, WoLpH, I am confused about something. In the past whenever I have made a progressbar without a context manager it always seems that the progressbar thinks it's not done when my loop is actually done (but it seems I do call update enough times from the behaviour I'd expect)

You are setting max_value to 10, but range(10) only goes up to 9 :)

Additionally, in some cases it can also be caused by a performance optimization. If you are calling update for every byte while downloading a 1 gigabyte file, that would mean 1 billion calls to the progressbar. The progressbar automatically tries to update only when needed which is usually a good thing.

In some cases however... the progressbar does not know when you are finished, to fix that you can either use the contextmanager to tell it, or you can manually call bar.finish() when you are done.

oh, ok. I thought that 0-9 there are 10 elements so 10 updates. But the progressbar exects n+1 updates to know it's done it seems. I assume the example you sent and the context manager know by the end of the loop/or end of context.

Thanks!

[brando90]

@wolph I think I found what I want:

import time
import progressbar
widgets = [
    progressbar.Percentage(),
    ' ', progressbar.SimpleProgress(format=f'({progressbar.SimpleProgress.DEFAULT_FORMAT})'),
    ' ', progressbar.Bar(),
    ' ', progressbar.Timer(), ' | '
                              ' ', progressbar.ETA(), ' | ',
    ' ', progressbar.AdaptiveTransferSpeed(unit='it'),
]
bar = progressbar.ProgressBar(widgets=widgets)
for i in bar(range(100)):
    time.sleep(0.1)
    bar.update(i)
100% (100 of 100) |#####| Elapsed Time: 0:00:10 |  Time:  0:00:10 |    9.8 it/s

the only thing that makes me sad is that the bar is so small :( how do I make it bigger. Everything else is more or less where I'd want it.

[wolph]

You can choose to make things less verbose. The Timer for example: https://progressbar-2.readthedocs.io/en/latest/progressbar.widgets.html#progressbar.widgets.Timer
If, instead of Elapsted Time: %(elapsed)s you use something like this: e %(elapsed)s

You can make it as small or wide as you want. Perhaps you don't need the SimpleProgress either if you already use a Bar.

[wolph]

oh, ok. I thought that 0-9 there are 10 elements so 10 updates. But the progressbar exects n+1 updates to know it's done it seems. I assume the example you sent and the context manager know by the end of the loop/or end of context.

The max_value specifies the actual value, you could even have floating point numbers such as 2.5 if you wanted to.